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Title: High pressure studies on a nematogen with highly polar molecules: Evidence for a nematic–nematic transition
Authors: Manjuladevi, V.
Madhusudana, N.V.
Issue Date: 10-Oct-2003
Publisher: Indian Academy of Sciences, Bangalore, India.
Citation: Current Science, 2003, Vol. 85, p1056-1061.
Abstract: We have modified a high pressure optical set-up to enable measurements on the optical path difference of aligned liquid crystals. We present the phase diagram of a polar nematogen, viz. p-cyanophenyl p-n heptyl-benzoate which is shown to exhibit a nematic (Nd) to nematic (N1) transition in the bulk at elevated pressures. We have also measured the temperature variations of the orientational order parameter (S) at various pres-sures to find that S has constant values at both the nematic to isotropic and Nd to N1 transitions at differ-ent pressures.
ISSN: 0011-3891
Copyright: Indian Academy of Sciences, Bangalore, India.
Appears in Collections:Research Papers (SCM)

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